Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-29T19:42:24.676Z Has data issue: false hasContentIssue false
  • English
  • Français

Recent Advances in the Observation and Analysis of Stellar Magnetic Fields

Published online by Cambridge University Press:  12 April 2016

Steven Saar
Steven Saar*
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street MS 58 Cambridge, MA 02138, USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

There has been considerable progress recently in the study of magnetic fields on late-type stars. Advances in the theory include investigation of systematic effects, new and improved methods of analysis for unpolarized and circularly polarized lines, new models of stellar dynamos and of broadband linear polarization, and the first studies of the thermodynamic nature of stellar magnetic regions and their vertical structure. Observationally, there have been new measurements, particularly of young and active stars (including the first detection of a field on a pre-main sequence object), a new monitoring campaign, the first indications of the relative temperatures in stellar plages, and the first measurements of fields in a single stellar active region. I discuss the results in the framework of stellar activity and surface structure.

Type
Part IV Stellar activity
Information
International Astronomical Union Colloquium , Volume 130: The Sun and Cool Stars: activity, magnetism, dynamos , 1991 , pp. 389 - 400
Copyright
Copyright © Springer-Verlag 1991

References

Basri, G.S.: 1987, Astrophys. J. 316, 377 CrossRefGoogle Scholar
Basri, G.S., Marcy, G. W.: 1991, these ProceedingsGoogle Scholar
Basri, G.S., Marcy, G.W., Valenti, J.: 1990, Astrophys. J. 360, 650 Google Scholar
Basri, G.S., Wilcots, E., Stout, N.: 1989, Publ. Astron. Soc. Pas. 101, 528 Google Scholar
Bopp, B.W., Saar, S.H., Ambruster, C., Feldman, P., Dempsey, R., Allen, M., Barden, S.P.: 1989, Astrophys. J. 339, 1059 Google Scholar
Borra, E.F., Edwards, G., Mayor, M.: 1984, Astrophys. J. 284, 211 Google Scholar
Bruning, D.H., Saar, S.H.: 1990, in Cool Stars, Stellar Systems, and the Sun ed. Wallerstein, G., Provo, ASP press, p. 165 Google Scholar
Butler, C.J. et al.: 1987, Astron. Astrophys. 174, 139 Google Scholar
Calamai, G., Landi Degl’Innocenti, E., Landi Degl’Innocenti, M.: 1975, Astron. Astrophys. 45, 297 Google Scholar
Donati, J.-F., Semel, M., Rees, D., Taylor, K., Robinson, R.: 1990, Astron. Astrophys. 232, L1 Google Scholar
Durney, B.R., Robinson, R.D.: 1982, Astrophys. J. 253, 290 Google Scholar
Galloway, D.J., Weiss, N.O.: 1981, Astrophys. J. 243, 945 Google Scholar
Gilliland, R.L.: 1985, Astrophys. J. 299, 286 CrossRefGoogle Scholar
Gray, D.F.: 1976, Observation and Analysis of Stellar Photospheres, Wiley, New York Google Scholar
Gray, D.F.: 1984, Astrophys. J. 281, 719 Google Scholar
Gray, D.F.: 1988, Lectures on Spectral-line Analysis: F, G, and K Stars, ArvaGoogle Scholar
Grossmann-Doerth, U., Schüssler, M., Solanki, S.K.: 1988, Astron. Astrophys. 206, L37 Google Scholar
Grossmann-Doerth, U., Solanki, S.K.: 1990, Astron. Astrophys., in pressGoogle Scholar
Hackman, T., Piskunov, N.E., Poutanen, M., Strassmeier, K.G., Tuominen, I.: 1991, these ProceedingsGoogle Scholar
Hartmann, L., Bopp, B.W., Dussalt, M., Noah, P.V., Klimke, A.: 1981, Astrophys. J. 249, 662 Google Scholar
Hartmann, L.W., Noyes, R.W.: 1987, Ann. Rev. Astron. Astrophys. 25, 271 CrossRefGoogle Scholar
Huovelin, J., Saar, S.H.: 1991, these ProceedingsGoogle Scholar
Keller, C.U., Solanki, S.K., Steiner, O., Stenflo, J.O.: 1990, Astron. Astrophys. 233, 583 Google Scholar
Kemp, J.C. et al.: 1987, Astrophys. J. Letters 317, 29 Google Scholar
Leroy, J.L.: 1962, Ann. d’Astrophys. 25, 127 Google Scholar
Landolfi, M., Landi Degl’Innocenti, M., Landi Degl’Innocenti, E.: 1989, Astron. Astrophys. 216, 113 Google Scholar
Linsky, J.L.: 1989, Solar Phys. 121, 187 Google Scholar
Livingston, W.C.: 1982, Nature 297, 208 CrossRefGoogle Scholar
MacGregor, K.B., Brenner, M.: 1989, Bull. A. A. S. 21, 1078 Google Scholar
Marcy, G.W., Basri, G.S.: 1989, Astrophys. J. 345, 480 Google Scholar
Marcy, G.W., Basri, G.S., Valenti, J.A.: 1991, these ProceedingsGoogle Scholar
Mathys, G., Solanki, S.K.: 1989, Astron. Astrophys. 208, 189 Google Scholar
Montesinos, B., Fernández-Villacañas, J.L., Jordan, C.: 1991, these ProceedingsGoogle Scholar
Mullan, D.J.: 1984, Astrophys. J. 279, 746 Google Scholar
Radick, R.R., Lockwood, G.W., Skiff, B.A., Baliunas, S.L.: 1988, Bull. A.A.S. 20, 995 Google Scholar
Robinson, R.D.: 1980, Astrophys. J. 239, 961 CrossRefGoogle Scholar
Saar, S.H.: 1988a, Astrophys. J. 324, 441 CrossRefGoogle Scholar
Saar, S.H.: 1988b, in Hot Thin Plasmas in Astrophysics, ed. Pallavicini, R., Kluwer, Dordrecht, p. 139 Google Scholar
Saar, S.H.: 1990a, in IAU Symp. 138, The Solar Photosphere: Structure, Convection, Magnetic Fields, ed. Stenflo, J. O., Kluwer, Dordrecht, p. 427 Google Scholar
Saar, S.H.: 1990b, in Mechanisms of Chromospheric and Coronal Heating, in pressGoogle Scholar
Saar, S.H., Linsky, J.L.: 1986, Advances in Space Physics 6, No. 8, 235 CrossRefGoogle Scholar
Saar, S.H., Bruning, D.H.: 1990, in Cool Stars, Stellar Systems, and the Sun ed. Wallerstein, G., Provo, ASP press, p. 168 Google Scholar
Saar, S.H., Neff, J.E.: 1990, in Cool Stars, Stellar Systems, and the Sun ed. Wallerstein, G., PASP Conf. Series, Provo, p. 171 Google Scholar
Saar, S.H., Linsky, J.L., Giampapa, M.S.: 1987, in Observational Astrophysics With High Precision Data, eds. Delbouille, L., Monfils, A., U. de Liège, Liège, p. 103 Google Scholar
Saar, S.H., Huovelin, J., Giampapa, M.S., Linsky, J.L., Jordan, C.: 1988, in Activity in Cool Star Envelopes, eds. Havnes, O. et al., Kluwer, Dordrecht, p. 45 Google Scholar
Saar, S.H., Golub, L., Bopp, B.W., Herbst, W., Huovelin, J.: 1990, in Evolution in Astrophysics, ed. Rolfe, E., ESA SP-310, p. 431 Google Scholar
Sánchez Almeida, J., García López, J.: 1991, these ProceedingsGoogle Scholar
Schrijver, C.J.: 1990a, Astron, Astrophys. 234, 315 Google Scholar
Schrijver, C.J.: 1990b, in Mechanisms of Chromospheric and Coronal Heating, in pressGoogle Scholar
Schrijver, C., Coté, J., Zwaan, C., Saar, S.H.: 1989, Astrophys. J. 337, 964 CrossRefGoogle Scholar
Semel, M.: 1989, Astron. Astrophys. 225, 456 Google Scholar
Simon, T., Herbig, G., Boesgaard, A.M.: 1985, Astrophys. J. 293, 551 CrossRefGoogle Scholar
Solanki, S.K.: 1986, Astron. Astrophys. 168, 311 Google Scholar
Solanki, S.K., Steiner, O.: 1990, Astron. Astrophys. 234, 519 Google Scholar
Stenflo, J.O.: 1989, Astron. Astrophys. Rev. 1, 3 Google Scholar
Stenflo, J.O., Lindegren, L.: 1977, Astron. Astrophys. 59, 367 Google Scholar
Steiner, O., Pizzo, V.: 1989, Astron. Astrophys. 211, 447 Google Scholar
Stȩpień, K.: 1989, Astron. Astrophys. 210, 273 Google Scholar
Sun, W.-H., Giampapa, M.S., Worden, S.P.: 1987, Astrophys. J. 312, 930 Google Scholar
Toner, C.G., Gray, D.F.: 1988, Astrophys. J. 334, 1008 Google Scholar
Toner, C.G., LaBonte, B.: 1990, Astropys. J., in press.Google Scholar
Unno, W.: 1956, Pub. Ast. Soc. Jap. 8, 108.Google Scholar
Valenti, J.A.: 1991, these ProceedingsGoogle Scholar
Vilhu, O.: 1984, Astron. Astrophys. 133, 117 Google Scholar
Vogt, S.S.: 1988, in IAU Symp. 132, eds. Cayrel, G., Spite, M., Kluwer, Dordrecht, p. 253.Google Scholar
Walter, F.M. et al.: 1988, Astron. J. 96, 297 CrossRefGoogle Scholar
Zwaan, C., Cram, L.E.: 1989, in FGK Stars and T Tauri Stars, eds. Cram, L.E., Kuhi, L.V., NASA SP-502, p. 215 Google Scholar